Automatic driving load control.



A. W. WARSEN.

AUTOMATIC DRIVING LOAD CONTROL.

APPLICATION HLED JUNE 2,1914.

Patented July 6, 1915.

WITNESSES AUGUST W. WARSEN, OF NEW YORK N. Y.

AUTOMATIC DRIVING LOAD CONTROL.

Lia-area.

Specification of Letters Patent.

Patented July 8, 11915.

Application filed June 2, 1914. Serial No. 842,491.

To all whom it may concern Be it known that 1, AUGUST W. WARSEN, acitizen of the United States, and a-resident of the city of New York,borough of Brooklyn, in the county of Kings and State of New York, haveinvented a new and Tmproved Automatic Driving Load Control, of which thefollowing is a full, clear, and exact description.

My invention relates to power transmission means, and has reference moreparticularly to coupling means connecting the driven and driving member,whereby an in crease in load on the driven member is prevented by anautomatic uncoupling of said driven and driving means.

An object of the invention is to provide a simple, strong andinexpensive contrivance which will prevent the transmission of a highertorque than a predetermined one and which will automatically uncouplethe driven member from the driving member and prevent damage to themoving parts.

A further object of the invention is to provide a device of the classdescribed in which the resilient means do not come into action until thetorque begins to exceed the predetermined one.

With theabove and other objects in view, the nature of which will morefully appear as the description proceeds, the invention consists in thenovel construction, combination and arrangements of parts as hereinfully described, illustrated and claimed.

In the accompanying drawings forming part of the application, similarcharacters of reference indicate corresponding parts in both views, andFigure 1 is a face elevation of an embodiment of my invention; and Fig.2 is a vertical section on line 2-2, Fig. 1.

Referring to the drawings, 3 represents a shaft to be driven by means ofa pulley 4 made rigid with a fly-wheel 5 by any suitable means. Thepulley and fly-wheel are mounted to rotate on a sleeve '6 keyed to theshaft 3. A loose pulley, 7 is mounted adjacent the fixed pulley 1. Theend of the sleeve adjacent the fly wheel 5 has a lateral flange 8 whichis rigid with the sleeve and is adapped to bear against the hub of thefly Pivotally mounted on the exterior face of the flange 8 is a pair offirst-class levers 9 and 16, preferably at right angles to each other,the fulcrum of the lever 9 being formed by a stud 11 secured totheflange, and that of the lever 10, by a stud 12 also carned by theflange. The end 13 of the long arm of the lever 10 engages a ll-shapednotch 14L in the shorter arm of the lever 9. The short arm of the lever10 abuts at one side against a fixed lug 15 carried by a bar 16 suitablysecured to the fly wheel 5. The other side of the short arm of the lever10 is engaged by a lug 17 mounted to slide on a bar 16, which lug ismaintained against the short arm of the lever 10 by a resilient member18, the compression of which may be varied by a screw 19- provided onthe bar. This arrangement prevents the running ahead of the drivenmember. The pawl 17' is to prevent the return of the lug 17 after it hasbeen moved by the lever 10. l

The end of the long arm of. the lever 9 is engaged by a bolt 20, whichbolt passes through a lug 21 integral with the flange 8. The bolt 20carries a compression spring 22, one end of which abuts against the lug21, while the other end engages a cup 23 which may be adjusted on thebolt by means of a nut 24 whereby the compression of the spring 22 canbe varied. This spring 22 controls the engagement between the levers 9and 10 and, therefore, the torque to be transmitted from the pulley 4 tothe shaft 3. That is to say, when the shaft 3 is overloaded by somecause the lever 10 wilLsnap out of the lever 9 by compressing the spring22, 2'. e., by moving the bolt 20 in the lug 21 until the end 13 of thelever 10 will snap out of the recess 14:. The movement of the lever 10'on the stud 12 will slide the lug 17 toward the screw 19 compressing thesame until the short arm of said lever is able to pass said lug. Toprevent interference between the lugs 15 and 17 and the lever 10, afterthe same. has been discon nected therefrom the short arm of said leveris provided with a pin 25 engaged by one end of the spring 26, the otherend of said spring being connected to a stud 27 carried by the flange.The tendency of this spring, as can be seen from Fig. 1, is to move theshort lever 10 against a pin 28 provided on the flange 8. To furtherinsure that there will be no displacement of the lever 10 after the samehas been disengaged from the le ver 9, a spring-actuated plunger 29 ispro- -.which is adapted to engage a recess 30 provided in the flange 8when said lever is brought against the pin 28 by the spring 26. Toprevent vibration of the lever .9, that may be set up by the spring 22,the same, adjacent the bolt 20, is provided with a set screw 31 adaptedto engage the lug 21 of'the flange 8,

Although the drawing shows only one pair of levers 9 and 10, more pairsof levers can be provided on the flange 8, in which case the otheraccessories for the levers will be provided accordingly. It isself-evident that where only one pair of, levers is used properbalancing means .are provided .on the fly-wheel 5 and on the flange 8.

1 It will be noted that the lever 10 has its fulcrum or pivot 12parallelto; and in the plane with the axis of the shaft 3, and that theaxis of said lever 10 is in the plane passing through the axes of thefulcrum and the shaft 3 when said lever engages the lever 9. By placingthe lever 10 as stated, the vibration that may be caused by the yieldingengagement of said levers is reduced to a minimum and only a slightexcess of i ,load on the shaft 3 will separate the levers 9 and 10. q

From the foregoing description, taken in connection with theaccompanying drawings, the advantage of the construction and operation.of the device shown will be readily understood by those skilled in theart to which the invention'pertains; and while -I have described theprinciple of operation, together with the device which I now con-' siderto be the best embodiment thereof, I

desire to have it understood that the device shown is merelyillustrative and that such changes may be made when desired as arewithin-the scope of the appended drawings. Having thus described myinvention, I claim as new and desire to secure by Letters Patent:

1. In. a device of'the class described, the combination of a driving anda driven member, apair ofangularly disposed levers of f the first classcarried by the driven member whereby the torque from the driving mem-.

her is transmitted to the drivenmember, means yieldingly connecting thesaid angularly disposed levers, means associated with the driving memberand one of said levers whereby the driven member is prevented fromrunning ahead of the driving member, and means for locln'ng .said lastmentioned lever to the driven member when said pair of levers have beendisconnected substantially as and for the purpose set forth.

2. In a device of the class described, the combination of a driving anda driven member; angularly disposed levers of the first class carried bythe driven member, said levers having unequal arms, -the short arm ofyieldingly connected to each other, the short,

arm of said second lever being adapted to be engaged by the drivingmember, whereby the torque from the driving member is transmitted to thedriven. member; and means associated with said second lever whereby thesame is locked to the driven member when it has been'disengaged from thedriving member. 1

3. In a device of the class described the combination of a driving and adriven member, a pair of angularly disposed levers of the first classcarried by the driven member, means on the driving member engaging oneof said levers whereby the torque from the driving member can betransmitted to the driven member, resilient means associated with theother lever whereby said levers are yieldingly connected to one anotherand whereby only a predetermined torque can be transmitted from the'driving to the driven member, and means associated with the drivingmember normally engaging said lever engaged by said driving memberwhereby the driven member is prevented from running ahead of the drivingmember. I

engagement-between the two levers isnormally maintained and whereby atorque, not exceeding a predetermined one, can be transmitted from thedriving to the driven member, and means on the driving member yieldinglyengagingv the lever engaged by said driving member whereby the drivenmember is prevented from running ahead of the (driving member.

5. In a device of the class described the combination of a driving and adriven member, a pair of interengaging levers of the first-class atright angles to each other carried by the driven member, resilient meansassociated with one of the levers and said driven member whereby ayielding engagement between the levers is maintained, means carried bythe driving member adapted to engage the other lever whereby the drivenand the driving members, are coupled, resilient means engaging said lastmentioned lever and carried by said driv ng member whereby the drivenmember is prevented from runningahead of the driving rma'raa mentionedlever in a predetermined position on said driven member when the samehas been disengaged from the other lever.

6. In a device of the class described the combination of a driving and adriven member, a pair of interengaging levers of the first class atright angles to each other-carried by said driven member, said levershaving unequal arms, one of said levers having a V-shaped notchinterengaged by the long arm of the other of said levers, resilientmeans associated with the long arm of the lever having a notch andwhereby said levers are yieldingly connected, a bar carried by thedriving member having means engaging the short arm of the other leverwhereby the torque from the driving member is transmitted to the drivenmember, a member slidably mounted on said bar, and a resilient membernormally maintaining said member against said short arm associated withthe driving member and whereby the driven member is prevented fromrunning ahead of the driving member, and locking means, associated withsaid last mentioned lever, becoming operative when said lever isdisengaged from the \l -shaped notch.

7. In a device of the class described the combination of a driving and adriven member, a pair of angularly disposed levers of the first classcarried by the driving member, resilient means associated with one ofthe levers whereby the said levers are yieldingly connected to oneanother, said driving member having means engaging the other of saidlevers, and locking means associated with said second lever whereby saidlever is prevented from interference with said. driving member when saidlever is disengaged from thefirst lever, said locking means becomingoperable after said lever has been disengaged from the lever associatedwith the resilientmeans.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

AUGUST W. WARSEN.

Witnesses:

BENEDICT JOFFE, PHILIDP D. RoLLHAUs.

